Electronic messages can be composed and delivered in different formats, primarily as either styled documents or plain characters. The first allows for the incorporation of images, varied fonts, and complex layouts, enhancing visual appeal. The second transmits only the alphanumeric characters of the message, devoid of any styling or embedded elements. For instance, a newsletter with company branding and interactive buttons uses the first method, whereas a simple notification containing just essential information uses the latter.
The choice of composition technique impacts delivery rates, rendering consistency, and the overall user experience. Originally, only the simplest representation was possible, but advancements permitted richer presentations. This shift enabled marketers to create more engaging campaigns. However, potential compatibility and security issues led to a continued need for the unformatted approach.